Sherlock Holmes links items into a logical story

In mnemonics it's important to divide a bigger plan into smaller chunks, ultimately getting "keywords" you want to memorize. And then you try to add them up, piece by piece, into a story. Just look how Sherlock does it:

He subconsciously sees all that is around him, but only notices the peculiarities, and of them selects the important ones - the clues ("keywords").

Ordering the clues (in his mind)

Composes a logical story, in each link concentrating only on a small detail (for example visualizing two glasses being clinked together and hearing the ringing sound it produces).

Also, the more senses you use, the more comprehensible/memorable the actions become. For a comparison watch the scene again, this time on mute, and then again with sound. Notice the difference?